When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Evolution of fish - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_fish

    Fish may have evolved from an animal similar to a coral-like sea squirt (a tunicate), whose larvae resemble early fish in important ways. The first ancestors of fish may have kept the larval form into adulthood , as some sea squirts do today, although this path cannot be proven.

  3. Timeline of fish evolution - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_fish_evolution

    The evolution of fishes took place over a timeline which spans the Cambrian to the Cenozoic, including during that time in particular the Devonian, which has been dubbed the "age of fishes" for the many changes during that period. The Late Devonian extinctions played a crucial role in shaping the evolution of fish, or vertebrates in general. [1]

  4. Evolution of tetrapods - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_tetrapods

    The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.

  5. How 500 Fish Species Rapidly Evolved in One Lake

    www.aol.com/lifestyle/500-fish-species-rapidly...

    Scientists are calling it the “the most rapid radiation event among vertebrates” ever discovered.

  6. Timeline of the evolutionary history of life - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the...

    Beginning of animal evolution. [54] [55] 720–630 Ma Possible global glaciation [56] [57] which increased the atmospheric oxygen and decreased carbon dioxide, and was either caused by land plant evolution [58] or resulted in it. [59] Opinion is divided on whether it increased or decreased biodiversity or the rate of evolution. [60] [61] [62 ...

  7. Namibia fossil is a prehistoric 'swamp thing' with menacing fangs

    www.aol.com/news/namibia-fossil-prehistoric...

    Roughly 100 million years before Gaiasia existed, the first land vertebrates had evolved from fish with fleshy fins. These are called the stem tetrapods. They lived an amphibious lifestyle though ...

  8. Tetrapod - Wikipedia

    en.wikipedia.org/wiki/Tetrapod

    The first tetrapods probably evolved in the Emsian stage of the Early Devonian from Tetrapodomorph fish living in shallow water environments. [ 36 ] [ 37 ] The very earliest tetrapods would have been animals similar to Acanthostega , with legs and lungs as well as gills, but still primarily aquatic and unsuited to life on land.

  9. Fins of prehistoric fish reveal origins of the human hand - AOL

    www.aol.com/news/fins-prehistoric-fish-reveal...

    Inside the stout fins of a fish that prowled the shallow waters of an estuary in what is now eastern Canada about 380 million years ago, scientists have found what they call the evolutionary ...